Carrier Corporation

Runfu Shi

Yu Zhu

Guangyu Shen

Hui Zhai

YuHui Kuang

Xiangyu Gao

Larry D Burns

Jun Pyo Lee

Keyu Li

Matthew Clark

Yuhui Kuang

A refrigeration system configured for controlling operation of a compressor is disclosed. The refrigeration system comprises an electronic expansion device operatively coupled with the compressor. The refrigeration system comprises a controller operatively coupled with the electronic expansion device. The controller is configured to control the electronic expansion valve based on a superheat setpoint range. The controller is further configured to adjust the superheat setpoint range in response to an operating point of the compressor being within a threshold distance from a boundary of an operational envelope for the compressor.

Systems and methods for active compressor control

An apparatus and a method for detecting refrigerant leakage in an air source heat pump system. The method for detecting refrigerant leakage in an air source heat pump system includes the following steps in a cooling mode: S: obtaining a running parameter of an air source heat pump system, wherein the running parameter at least includes a compressor rotational speed; S: comparing the running parameter with a preset running parameter range; S: updating a cumulative score when the running parameter falls within the preset running parameter range; and S: when the cumulative score exceeds a predetermined cumulative score, determining that refrigerant leakage occurs, and when the cumulative score does not exceed the predetermined cumulative score, return to step S

Detection apparatus and method for refrigerant leakage of air source heat pump system

A heat pump system comprises: a main heat exchange circuit, comprising a two-stage compressor (), a condenser (), a throttle element () and an evaporator (), which are connected in sequence to form a circuit; an economizer, disposed between the condenser and the evaporator; a gas supplement branch, connecting a gas outlet of the economizer to a gas supplement port of the compressor, with an economizer regulating valve () for controlling the opening and closing of a flow path being arranged on the gas supplement branch; and a control device, wherein the control device controls the opening and closing of the economizer regulating valve based on a refrigerant state feature in the evaporator during a start-up stage of the heat pump system.

Heat pump system and start up control method thereof

A refrigerant leak detecting method for an air-cooling heat pump system in a heating mode comprises S, S, obtaining a leak indication parameter set, wherein the leak indication parameter set at least includes a refrigerant level in a liquid reservoir and/or a supercooling degree; S, S, comparing each leak indication parameter in the leak indication parameter set with a corresponding preset indication parameter interval; S, S, when each leak indication parameter falls within a corresponding preset indication parameter interval, obtaining and recording a corresponding evaluated refrigerant leak amount; S, S, when a cumulative value of the evaluated refrigerant leak amount falls within a preset refrigerant leak interval, determining that a refrigerant leak occurs in the air-cooling heat pump system; when the cumulative value of the evaluated refrigerant leak amount does not fall within the preset refrigerant leak interval, returning to the step S, S

Air cooling heat pump system, refrigerant leakage detection method and detection system air cooling heat pump system thereof

A steady-state data processing method includes resetting a cumulative change of target determination data and a data detection period as 0; obtaining the detected target data; calculating the cumulative change of the target data. When the calculated cumulative change of the target data is less than a preset threshold, adjusting the data detection period, or when the calculated cumulative change of the target data is not less than the preset threshold, recording a data detection period. When the recorded data detection period is less than a preset time threshold, determining a target data result obtained in the period as unsteady-state data of the device; or when the recorded data detection period is not less than the preset time threshold, determining the target data obtained in the data detection period as steady-state data.

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Shanghai, China

Runfu Shi